212021110420 has 48 divisors (see below), whose sum is σ = 509288588928. Its totient is φ = 72630391680.

The previous prime is 212021110393. The next prime is 212021110421. The reversal of 212021110420 is 24011120212.

212021110420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212021110394 and 212021110403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021110421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488271 + ... + 813910.

It is an arithmetic number, because the mean of its divisors is an integer number (10610178936).

Almost surely, 2^212021110420 is an apocalyptic number.

212021110420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021110420 is an abundant number, since it is smaller than the sum of its proper divisors (297267478508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021110420 is a wasteful number, since it uses less digits than its factorization.

212021110420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303360 (or 1303358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212021110420 its reverse (24011120212), we get a palindrome (236032230632).

The spelling of 212021110420 in words is "two hundred twelve billion, twenty-one million, one hundred ten thousand, four hundred twenty".